UCC38051DR

Overview

Category: Integrated Circuit (IC)

Use: Power Management Controller

Characteristics: - High-performance current mode PWM controller - Designed for off-line and DC-to-DC power supplies - Provides necessary features to implement a highly efficient and reliable power supply system

Package: SOIC-8

Essence: The UCC38051DR is an integrated circuit that serves as a power management controller. It is widely used in various applications, including off-line and DC-to-DC power supplies. With its high-performance current mode PWM control, it enables the implementation of efficient and reliable power supply systems.

Packaging/Quantity: The UCC38051DR is available in a small outline integrated circuit (SOIC) package with 8 pins. It is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 7V to 20V
• Operating Temperature Range: -40°C to 85°C
• Maximum Duty Cycle: 100%
• Oscillator Frequency Range: 50kHz to 1MHz
• Output Current Sink Capability: 500mA
• Error Amplifier Bandwidth: 10kHz
• Soft Start Time: Adjustable

Pin Configuration

The UCC38051DR has the following pin configuration:

___________ | | 1 | VREF | 8 2 | COMP | 7 3 | FB | 6 4 | RT/CT | 5 |___________|

1. VREF: Reference voltage input pin.
2. COMP: Error amplifier output pin.
3. FB: Feedback input pin.
4. RT/CT: Timing resistor/capacitor connection pin.

Functional Features

• Current mode PWM control for improved stability and transient response.
• Adjustable soft start time to prevent excessive inrush current.
• Error amplifier with high bandwidth for precise regulation.
• Overvoltage protection and undervoltage lockout for enhanced safety.
• Internal oscillator with adjustable frequency range.
• Built-in leading-edge blanking for improved noise immunity.

Advantages

• High-performance controller for efficient power management systems.
• Wide supply voltage range allows flexibility in various applications.
• Adjustable soft start time prevents excessive inrush current.
• Comprehensive protection features enhance system reliability.
• Compact SOIC package enables space-saving designs.

Disadvantages

• Limited sink capability of 500mA may not be suitable for high-power applications.
• Requires external components for complete power supply implementation.
• May require additional circuitry for specific application requirements.

Working Principles

The UCC38051DR operates based on the current mode PWM control principle. It compares the feedback voltage (FB) with a reference voltage (VREF) to generate an error signal. This error signal is then amplified by the internal error amplifier (COMP) and used to control the duty cycle of the PWM output. By adjusting the duty cycle, the UCC38051DR regulates the output voltage or current of the power supply system.

Detailed Application Field Plans

The UCC38051DR can be applied in various fields, including but not limited to: 1. Off-line power supplies for consumer electronics. 2. DC-to-DC converters for industrial equipment. 3. LED lighting systems. 4. Battery charging circuits. 5. Automotive power management systems.

Alternative Models

For alternative options, the following models can be considered: 1. UCC38050DR: Similar functionality with minor differences in specifications. 2. UCC38052DR: Higher sink capability and extended temperature range. 3. UCC38053DR: Enhanced protection features and wider operating voltage range.

These alternative models provide similar functionality and can be chosen based on specific application requirements.

Word count: 498 words